高铁隧道内气动效应形成损坏痕迹特点分析

动车高速通过隧道时,运行车体推动的空气由于受到隧道壁的约束能形成能量很强的冲击气流,有时会造成一些设备设施损坏、脱落,进而危及高铁行车安全。这类事件发生后,铁路部门往往误以为是人为破坏,并以破坏案件进行上报。本文通过对特定动车行车事故的现场勘验、调查访问,分析了高铁隧道内气动效应对特殊位置设施造成损坏的过程及形成痕迹特点,准确认定了事件性质和事故发生原因,并对气动效应形成损坏痕迹和常见工具形成痕迹的区别进行了探讨。     

Do volatile voters vote less correctly? An analysis of correct voting among vote (intention) switchers in US presidential election campaigns

The literature on electoral volatility and the literature on electoral campaigns hold contradictory views on voters switching vote (intention) during the campaign. In this note, we shed new light on this contradiction, making two contributions. First, we investigate the extent to which stable and volatile voters choose the correct party. Second, we distinguish levels of correct voting and the impact of the act of switching on the correctness of the vote. Our analyses of vote-switching in American elections show that, while volatile voters are less likely to vote correctly, they are more likely to switch from an incorrect to the correct party than vice versa. Furthermore, we show that following the campaign more closely makes voters more likely to switch vote (intention) towards the correct party.     

Small arms and light weapons: the disjunction problem

ABSTRACT

Growing in range and urgency, humanitarian needs now pose increasingly acute questions for national security policy formulation. Whether over forced migration, food scarcity or nefarious electronic penetration, state security preferences face uneasy accommodations with individual needs be it for child survival, basic sustenance or rights to privacy. This paper deliberates a further field of increasingly apparent value contest: that involving the transfer, diversion and lethal use of small arms and light weapons (SALW). After outlining the scale of this phenomenon, existing regulatory mechanisms over SALW transfers are assessed. It is argued that these controls are inadequate, a deficiency that is embedded within a range of inter-linked disjunctions. They are outlined in a model that is evaluated against empirical findings. Where SALW control inadequacy is causally connected to the disjunctive model, it is argued, current levels of SALW-induced casualties are unlikely to abate. The paper concludes by considering feasible options for enhanced management of global SALW proliferation.     

What encourages households to adopt rice as a new crop? Understanding gender roles and perceptions in households in northern Namibia

This article investigates how the introduction of new crops influences intra-household decision-making among the Ovambo in northern Namibia where women are responsible for crop farming, while men are engaged in livestock farming. It examines gender relations that underlie daily activities. The findings of the study show that women try new crops on their own or with the help of their children and do not negotiate with their husband, mothers, or brothers over household resources such as land, labour, and the cash of other family members. Women avoid conflicts with family members, but may have an increased perception of contribution to the household if they succeed in introducing new crops.     

“Gendering” European security: policy changes,reform coalitions and opposition in the OSCE

The Organisation for Security and Co-operation in Europe (OSCE) has rarely been considered in scholarship on gender and security, even though it was one of the regional security organisations whose gender policy predated the United Nations Security Council’s call for more international attention to issues related to women, peace and security in October 2000. Based on an analysis of official OSCE documents and on semi-structured interviews, we trace the integration of gender issues in the OSCE and explore the rationale behind and the challenges associated with it. We identify two phases of gender policy change in the OSCE and show how the integration of UNSCR 1325 brought about an expansion of OSCE gender policy from an exclusive focus on “soft” security issues towards increased inclusion of gender in the area of “hard” security. Drawing on historical and feminist institutionalism, we argue that reform coalitions were crucial for the policy changes in the OSCE but that they encountered institutional and ideational barriers, which hampered implementation of the gender policy. In light of rising opposition, our analysis warns of a backlash that might jeopardise current achievements.     

This is your afterlife: gender,slavery, and televisual subjection

In 1957 Arries Ann Ward, who was formerly enslaved, appeared on the classic television interview-entertainment program, This Is Your Life. Despite Ward’s practices of refusal, the rare interview enacts an idealization of black female servitude and indebted obligation through performances of affection and racial benevolence. Ward’s appearance effectively works to resolve national crisis produced by widespread images of civil-rights protest and counterinsurgent violence, reifying discourses of American exceptionalism in Cold War context.     

Changing knowledge and perceptions of African indigenous vegetables: the role of community-based nutritional outreach

African indigenous vegetables (AIVs) have potential to sustainably address malnutrition, a growing problem in sub-Saharan Africa. Their consumption is however, limited by poor perceptions and lack of awareness of nutritional benefits. There is limited evidence of the effectiveness of community-focused information dissemination approaches in influencing participants’ perceptions and uptake of innovations in AIVs to address malnutrition. This article aims to fill this knowledge gap, using a case study focusing on pastoral communities in Monduli district in northern Tanzania. Target communities participated in a community-based nutritional outreach facilitated by the Good Seed Initiative (GSI), held at Monduli district hospital in September 2014. The results provide evidence of the achievements of the GSI intervention, and the effectiveness of alternative information dissemination approaches.     

肌肉电导率和pH两指标联用推断死亡时间

目的探讨肌肉浸渍液电导率(electrical conductivity,EC)、pH两指标联用在PMI推断上的意义。方法 SD大鼠处死后,保存在25℃环境中,于不同PMI提取大鼠后肢肌肉制备匀浆液,测定浸渍液EC和pH。分析EC、pH两指标联合使用推断PMI的意义。结果 EC、pH两指标随PMI均呈现阶段性变化:1d内,pH明显下降,EC无明显变化;2~3d,EC、pH均快速增大;4~10d,EC继续增大,而pH变化不明显。EC、pH联合使用,有助于划分PMI时段,以及特定时段内指标的优化:1d内,选择pH最佳,2~3d,EC、pH联用最佳,4~10d,选择EC最佳。结论 EC、pH联用有助于提高PMI推断的准确性。     

Recruitment and selection practices among non-governmental organizations (NGOs) in Ghana

Taking into consideration the eugenic nature and perspective of high-performance human resource management functions on organizational effectiveness, the authors examined managerial and employee level of recruitment and selection on operational performance with emphasis on human capital and three indicators of organizational commitment (affective, normative, and continuous) as mediators. Questionnaires totaling 282, 122 for managerial level and 160 for employee level, were administered. A multilevel analysis of data were conducted on a selected number of Ghanaian NGOs using Statistical Package for Social Sciences (SPSS). The study revealed that recruitment and selection ideally leads to improved operational performance, however, this affiliation can be enhanced through the inescapable role of human capital and the three commitment indicators (affective, normative, and continuous). It was also exposed that effective recruitment and selection leads to a desirable employee’s level of affective, normative and continuous commitment, which also have greater influence on the operational performance. The study is thus considered very significant contextual support to existing literature and practitioners since not much of such work has been done in the Ghanaian context. Therefore, the current study implicates recruitment and selection, human capital, and the three commitment levels as a core value-creating ability that drives non-governmental organizations performance.     

The social semiotic of homophone phrase substitution in Chinese netizen discourse

The paper addresses an ingenious way by which Chinese netizens manage to reach their intended audiences under the radar of censors surveying the Internet in China. One specifically Chinese social use of language in this respect is the option to express criticism by using inoffensive characters that share the same or similar pronunciation with politically sensitive phrasing. We identify this type of expression as homophone phrase substitution (HPS). The device has been part of Chinese since ancient times under the name political metaphor. We address the main constraints at work in HPS, especially the role of voice (prosodic contour) that guides the construction of two divergent kinds of aboutness. Leaving aside its critical function in contemporary society, by contrasting HPS with verbal irony, metaphor, and Australian rhyming slang, and by drawing on semiologie and semiotics, indirect speech acts and implicit deixis, we suggest that this linguistic option throws new light on the semantic/pragmatic distinction.